Advance Product Information
Subject to Change
VSC7111 Datasheet
Registers
Table 20.
Page 20’h: Output PE 1 (continued)
Bit Name
Access Description
Default
5:3 CPE1LEVEL
R/W
PE 1 level
000
111: Maximum PE
…
001: Minimum PE
000: PE off
2:0 CPE1DECAY
R/W
PE 1 decay time constant
111: Slowest decay
…
000
000: Fastest decay
3.3.12
Output PE 2
This register configures the pre-emphasis amp 2 (PE 2) value and decay time constant
for the selected output.
Table 21.
Page 21’h: Output PE 2
Bit Name
Access Description
Default
00
7:6 Unused
5:3 CPE2LEVEL
R
Unused
R/W
PE 2 level
000
111: Maximum PE
…
001: Minimum PE
000: PE off
2:0 CPE2DECAY
R/W
PE 2 decay time constant
111: Slowest decay
…
000
000: Fastest decay
3.3.13
Output Level
This register sets the output power level (peak-to-peak differential voltage).
Table 22.
Page 22’h: Output Level
Bit Name
Access Description
Default
7
CODPWR_OVRD
R/W
Allow CODHIGHPOWER to control output driver
0
power/bandwidth
1: CODHIGHPOWER register controls the output
driver bandwidth/power
0: LOWPWR pin controls the output driver
bandwidth/power
6
CODBOOST
R/W
R/W
Output driver bandwidth
1: Do not scale currents with output level
0: Scale currents with output level
0
5:4 CODHIGHPOWER
Output driver bandwidth
00
11: Maximum power/bandwidth when
CODPWR_OVRD = 1
00: Minimum power/bandwidth when
CODPWR_OVRD = 1
Revision 2.0
September 2010
Confidential
Page 32
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
